Measuring and geometric instrument



A. Q. M REYNOLDS MEASURING AND GEOMETRIG INSTRUMENT Dec, 14, 1926.1,610,803

Filed Jan. 5, 1.925

T/ 2 lill/ll I III I I'll I ll ,1 I l I l i W Patented Dec. 14, 1926.

ASA O. IvICREYNOLDS, OF CLEVELAND, VIRGINIA.

MEASURING AND GEOli/IETRIC INSTRUMENT.

Application filed. January 3, 1925.

The present invention ally to measuring and ments.

The invention aims to provide a structure capable of cutting out hipgrooves, bridges, braces, door and window casings and bases, makingplumb cuts, measuring pitches and other similar operations. which willbe evident to those skilled in the use of similar instruments after aconsideration of this detailed disclosure.

A very important object of the invention is to provide an instrument ofthis nature, which is possessed of an extremely simple and efficientstructure, one which is thoroughly reliable in operation, inexpensive toconstruct, easy to operate, accurate, not liable to readily get out oforder, strong, durable, and otherwise well adapted for the 20 purposefor which it is designed.

l Vith the above and numerous other objects in view, as will appear asthe description proceeds, the invention resides in certain novelfeatures of construction, and in the combination and arrangement ofparts as will be hereinafter more fully described and claimed.

In the drawing: Figure 1 is a plan view of the instrument embodying thefeatures of my invention.

Figure 2 is an edge elevation thereof.

Figures 3 and 4 are transverse sections, taken substantially on thelines 83 and 4- 1 respectively, of Figure 1, and

Figure 5 is a detail plan view, showing one end of the main plate.

Referring to the drawing in detail, it will be seen that 1 designatesthe supporting frame, which is provided with a relatively long edge 5and the relatively short edge 6. These edges 5 and 6 are straight edges,and are disposed at right angles to each other. On the straight edge 6adjacent the ends thereof, there is provided a raised portion 7, havinga slot 8 extending therethrough, and an opening 9 extending therethroughat right angles to the slot. The main blade 2 is constructed, at oneend, with an elongated notch 10, and on one surface with a longitudinally extending groove 12, starting at the notch 10, and terminatingbetween the ends of the blades. The slot 8 is continued through thestraight edge 6, so as to form a groove, in which one edge of the mainblade 2 may rest. When the main blade is rested in the groove or slot 8,the notched or biappertains genergeometric 1nstrulll Serial No. 343.

furcated end 10 thereof is extended through the enlarged portion 7, anda stud 13 is adapted to be extended through the opening 9 and throughthe notch 10. This stud 13 is provided with the head 14 countersunk intothe frame and a threaded reduced shank 15 for a purpose to behereinafter mentioned. A set screw 16 is threaded throughthe frame 1, toengage the stud 13 and bind with the same to hold it in place. A bolt 17is extended through the frame, adjacent the juncture of the straightedge 6, with the straight edge 5. and is reduced at one end, theterminal of the reduced end being provided with a hooked extension 18adapted to be received in the groove 12, and by screwing up on the nut19 provided on this bolt 17, the blade 2 is held in desired fixedposition with relation to the frame 1. This blade 2, of course, isextended rectangularly in relation to the straight edge 5, and so thatits edges are disposed, one on each side of, and parallel to thestraight edge 6. Suitable indicia is marked on the blade 2, forreduction purposes and need not here be described in detail.

An auxiliary blade 3 has also provided thereon suitable indicia and isfixed to a head 20, having an arcuate portion 21, with degrees marked onits outer edge and corresponding pitch markings from 1 to 24 on itsinner edge. These pitch markings indicate bevels, or pitches of roofs,or any degree between 1 to 90. An arm 22 is formed on the frame 1 and isprovided with a pair of spaced raised portions 28, between which thearcuate portion 21 is adapted to move when the blade 3 is swung. A hairmarker 24; extends over the raised portion 23, for cooperation with theindicia provided on the quadrant so that, for instance, the degreebetween the two blades may be read by noting the particular marking atwhich the arcuate portion has stopped. The head 20 is rotatable on thethreaded extension 15 of the stud 13 and may be held in differentadjusted positions by the nut 25. The free end of the blade 3 isbevelled, as is indicated at 26 in order to obtain small miter cutsafforded by degree angle.

It is thought that the utility and advantages of the instrument will beclearly understood without a very definite outline of the operation ofthe various parts. I do, however, desire to set forth some of theoperation in outline, and it is to be understood that these are merelygiven by way of we.

ample. In using the device in cutting out hip roofs, that is differentbevel cuts of rafters, the blade 3 is set to suit the side out, so thatthis side out and tri-square cut may be made. The device could then bevery quickly changed to a plumb cut. The indicia on the inside of thequadrant corresponds to figures on a framing square, and thus any pitchor degreecen be obtained. In obtaining pitches, blade 2 is placed on theplate level that is the horizontal or base cut of the :rafters, whileplate 3 is placed on the rafter. The use of the device for bridges,brace cuts,'and as a common bevelled square. seems to be self evidentwithout any need of: a detailed description.

Inorder that some of the operations of the device may be understood, itis desired to point-out that the blade 2 maybe extended at differentdistances in relation to the straight edge 5, merely by unloosening thenut 19, on the bolt 17. and sliding the blade Qto the desired position.

It will be apparent from the above detailed description that the deviceis'capable of easy and ready manipulation to carry out the variousoperations-described, and others not mentioned, and that the device ispossessed of a very simple, yet efficient structure.

It will also be apparent that I have obtained all of the features andadvantages enumerated as desirable, in the statement of the inventionandthe above description, and thatnumerous changes in the details ofconstruction, in the material, and in the combination and arrangement ofparts may be resorted to, Without departing from the spirit or scope ofthe invention as hereinafter claimed, or sacrificing any of itsadvantages.

.Having thus described my invention, What I claim as new and desire tosecure by Letters Patent is:

A ,measuring instrument of the class described including a frame havinga pair of rectangularly disposed straight edges, one of which it;provided with a longitudinally extending groove, a blade having one edgesituated to slide in said groove, said blade being provided with a notchat one end and longitudinal channel extending inwardly therefrom, a boltextended through the frame and provided with a hooked end engaging "thechannel so as to hold the blade in the groove, means associated with thebolt for causing it to 'frictionally hold the blade :in differentadjusted extended positions in relation to the frame, said frameprovided with an opening registering with the notch, a bolt extendingthrough the opening and through the notch, and a blade pivoted 0n thelast-mentioned bolt for being dispoied at different angles with relationto the first blade.

In testimony whereofl aflixmy signature.

ASA O. MCREYNOLDS.

